
var t = n =0, count;

$(document).ready(function(){ 

count=$("#banner_list a").length;

$("#banner_list a:not(:first-child)").hide();

$("#banner_info").html($("#banner_list a:first-child").find("img").attr('alt'));

$("#banner_info").click(function(){window.open($("#banner_list a:first-child").attr('href'), "_blank")});

$("#banner li").click(function() {

var i = $(this).text() -1;//获取Li元素内的值，即1，2，3，4

n = i;

if (i >= count) return;

$("#banner_info").html($("#banner_list a").eq(i).find("img").attr('alt'));

$("#banner_info").unbind().click(function(){window.open($("#banner_list a").eq(i).attr('href'), "_blank")})

$("#banner_list a").filter(":visible").fadeOut(500).parent().children().eq(i).fadeIn(1000);

document.getElementById("banner").style.background="";

$(this).toggleClass("on");

$(this).siblings().removeAttr("class");

});

t = setInterval("showAuto()", 1000);

$("#banner").hover(function(){clearInterval(t)}, function(){t = setInterval("showAuto()", 2000);});

})



function showAuto()

{

n = n >=(count -1) ?0 : ++n;

$("#banner li").eq(n).trigger('click');

}
